Lesson 1 Inverse Square Law

The inverse square law states that the intensity of the light from a point source diminishes inversely to the square of the distance.  I=1/d²  Here is a better illustration that what I drew on the white board.

 

 



 

 

 

 



Here is what the results of shoot should looklike with the middle grey card adjusted in Lightroom and tweaked in photoshop to look the same.  You can see the Front card gets darker in relation to the Middle card as the light is moved further away and the Back card gets lighter as the light is moved further away.

 



 

Here is an example of the results of adjusting the distances of the black, white and grey cards.